Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 9, NWS Twin Cities, MN

May 6, 2008Redwood County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 6, 2008, 3:05 PM CDT for Redwood County, Minnesota. It was in force for 40 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 6, 2008, 3:05 PM CDT (20:05 UTC)
Expired: May 6, 2008, 3:45 PM CDT
In force: 40 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon

County Redwood County, MN

The radar

The Sioux Falls radar (KFSD), 140 km from the middle of the area, began a volume at 20:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
May 6, 3:24 PM CDT	HAIL 0.75	Walnut Grove, MN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.1 hours before the alert went out and 147 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2336 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KMPX 062005
SVRMPX
MNC127-062045-
/O.NEW.KMPX.SV.W.0009.080506T2005Z-080506T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
305 PM CDT TUE MAY 6 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN REDWOOD COUNTY IN SOUTHWEST MINNESOTA...

* UNTIL 345 PM CDT

* AT 302 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING PENNY SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 11 MILES WEST OF WALNUT GROVE...
  OR ABOUT 4 MILES SOUTHWEST OF TRACY...AND MOVING NORTHEAST AT 36
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  WALNUT GROVE...
  LAMBERTON...
  WABASSO...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS AND LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 4449 9513 4428 9511 4422 9513 4421 9521
      4420 9549 4420 9559 4437 9559
TIME...MOT...LOC 2005Z 245DEG 31KT 4422 9565

$$

MDB

2 follow-up statements

000 
WWUS53 KMPX 062031
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
330 PM CDT TUE MAY 6 2008

MNC127-062045-
/O.CON.KMPX.SV.W.0009.000000T0000Z-080506T2045Z/
REDWOOD MN-
330 PM CDT TUE MAY 6 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CDT
FOR SOUTHWESTERN REDWOOD COUNTY...

AT 324 PM CDT...THREE-QUARTER INCH HAIL WAS REPORTED IN WALNUT GROVE 
WITH THIS STORM.

AT 328 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING PENNY SIZE HAIL.  THIS SEVERE
THUNDERSTORM WAS LOCATED NEAR REVERE...OR ABOUT 4 MILES EAST OF
WALNUT GROVE...AND MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE WANDA...WALNUT GROVE...
WABASSO...REVERE...LUCAN AND LAMBERTON.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

LAT...LON 4449 9513 4428 9511 4422 9513 4421 9521
      4420 9549 4420 9559 4437 9559
TIME...MOT...LOC 2030Z 251DEG 26KT 4423 9537

$$

MDB

000 
WWUS53 KMPX 062043
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
339 PM CDT TUE MAY 6 2008

MNC127-062049-
/O.EXP.KMPX.SV.W.0009.000000T0000Z-080506T2045Z/
REDWOOD MN-
339 PM CDT TUE MAY 6 2008

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN REDWOOD COUNTY
EXPIRES AT 345 PM CDT...

THUNDERSTORMS ARE WEAKENING BELOW SEVERE LEVELS BUT CONTINUE TO 
AFFECT CENTRAL AND EASTERN REDWOOD COUNTY WITH HEAVY DOWNPOURS AND 
DEADLY LIGHTNING WITH SMALL HAIL AND WIND GUSTS TO AROUND 45 MPH 
STILL POSSIBLE. REMAIN ALERT FOR POSSIBLE ADDITIONAL WARNINGS.

LAT...LON 4449 9513 4428 9511 4422 9513 4421 9521
      4420 9549 4420 9559 4437 9559
TIME...MOT...LOC 2039Z 251DEG 26KT 4426 9527

$$

MDB

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 6, 9:32 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	58 min
May 6, 11:50 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Redwood	37 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008 Every severe thunderstorm warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.